New fix disabling plugin container.exe for Firefox 28 or newer

[HennySavenije]

Question reference
http://www.tomsguide.com/faq/id-2141981/fix-disabling-plugin-container-exe-firefox-newer.html

Wile E Coyote writes "You will have to add the 4 remaining items below" I don't see a way to add these items

 

[rgd1101]

Right click on the about:config screen, then new boolean